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/*=========================================================================
*
* Copyright Insight Software Consortium
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0.txt
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
*=========================================================================*/
#include <iostream>
#include "itkImageRegionIterator.h"
#include "itkPolyLineParametricPath.h"
#include "itkPathFunctions.h"
#include "itkPathIterator.h"
#include "itkTestingMacros.h"
int itkPathFunctionsTest(int, char*[])
{
const unsigned int Dimension = 2;
typedef double PixelType;
typedef itk::Image< PixelType, Dimension > ImageType;
typedef itk::PolyLineParametricPath< Dimension > PolyLineParametricPathType;
typedef itk::ChainCodePath< Dimension > ChainPathType;
typedef itk::FourierSeriesPath< Dimension > FourierSeriesPathType;
typedef itk::PathIterator< ImageType, FourierSeriesPathType > PathIteratorType;
typedef ImageType::IndexType IndexType;
typedef PolyLineParametricPathType::VertexType VertexType;
bool passed = true;
// Set up the image
std::cout << "Making a 64x64 white square centered in a 128x128 black image" << std::endl;
ImageType::Pointer image = ImageType::New();
IndexType start;
start[0] = 0;
start[1] = 0;
ImageType::SizeType size;
size[0] = 128;
size[1] = 128;
ImageType::RegionType region;
region.SetSize( size );
region.SetIndex( start );
image->SetRegions( region );
double spacing[ImageType::ImageDimension];
spacing[0] = 1.0;
spacing[1] = 1.0;
image->SetSpacing( spacing );
image->Allocate();
typedef itk::ImageRegionIterator<ImageType> ImageRegionIteratorType;
ImageRegionIteratorType it( image, image->GetRequestedRegion() );
it.GoToBegin();
ImageType::PixelType storedValue;
IndexType pixelIndex;
while( !it.IsAtEnd() )
{
pixelIndex = it.GetIndex();
if( pixelIndex[0] >= int(size[0]/4) && pixelIndex[0] < int(size[0]*3/4) &&
pixelIndex[1] >= int(size[1]/4) && pixelIndex[1] < int(size[1]*3/4) )
{
it.Set( 1.0 );
}
else
{
it.Set( 0.0 );
}
++it;
}
// Retrieve and print the value stored at pixel index (32,32)
pixelIndex[0] = 32;
pixelIndex[1] = 32;
storedValue = image->GetPixel( pixelIndex );
std::cout << "The pixel at index (" << pixelIndex[0] << "," << pixelIndex[1]
<< ") has the value " << storedValue << ".\n" << std::endl;
// Set up the path
std::cout << "Making a square Path with v0 at (30,30) and v2 at (33,33)" << std::endl;
VertexType v;
PolyLineParametricPathType::Pointer inPath = PolyLineParametricPathType::New();
ChainPathType::Pointer chainPath = ChainPathType::New();
FourierSeriesPathType::Pointer path = FourierSeriesPathType::New();
v.Fill( 30 );
inPath->AddVertex( v );
v[0] = 33;
v[1] = 30;
inPath->AddVertex( v );
v.Fill( 33 );
inPath->AddVertex( v );
v[0] = 30;
v[1] = 33;
inPath->AddVertex( v );
v.Fill( 30 );
inPath->AddVertex( v );
itk::MakeChainCodeTracePath( *chainPath, *inPath );
std::cout << "New ChainCodePath has " << chainPath->NumberOfSteps() << " steps." << std::endl;
itk::MakeFourierSeriesPathTraceChainCode( *path, *chainPath, 2 );
// Test the iterator
std::cout << "Creating an iterator to trace the FourierSeriesPath" << std::endl;
PathIteratorType iter( image, path );
for( iter.GoToBegin(); !iter.IsAtEnd(); ++iter )
{
std::cout << "Path(" << iter.GetPathPosition() << ") @ " << iter.GetIndex()
<< " = " << iter.Get() << "; Now inverting." << std::endl;
iter.Set( 1.0 - iter.Get() );
}
for( iter.GoToBegin(); !iter.IsAtEnd(); ++iter )
{
std::cout << "Path(" << iter.GetPathPosition() << ") @ " << iter.GetIndex()
<<" = " << iter.Get() << std::endl;
}
std::cout << "Should still be at end: ";
std::cout << "Path(" << iter.GetPathPosition() << ") @ " << iter.GetIndex()
<< " = " << iter.Get() << std::endl;
if( ( iter.GetIndex() )[0] != 30 || ( iter.GetIndex() )[1] != 30 )
{
std::cout << "PathFunctionsTest: Failed to maintain a closed path" << std::endl;
passed = false;
}
if( passed )
{
std::cout << "Test passed" << std::endl;
return EXIT_SUCCESS;
}
else
{
std::cout << "Test failed" << std::endl;
return EXIT_FAILURE;
}
}
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